diff options
Diffstat (limited to 'contrib/netbsd-tests/lib/libc/sys/t_mincore.c')
| -rw-r--r-- | contrib/netbsd-tests/lib/libc/sys/t_mincore.c | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/contrib/netbsd-tests/lib/libc/sys/t_mincore.c b/contrib/netbsd-tests/lib/libc/sys/t_mincore.c new file mode 100644 index 0000000..553207a --- /dev/null +++ b/contrib/netbsd-tests/lib/libc/sys/t_mincore.c @@ -0,0 +1,318 @@ +/* $NetBSD: t_mincore.c,v 1.8 2012/06/08 07:18:58 martin Exp $ */ + +/*- + * Copyright (c) 2011 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Jukka Ruohonen. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/*- + * Copyright (c) 1999 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, + * NASA Ames Research Center. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#include <sys/cdefs.h> +__RCSID("$NetBSD: t_mincore.c,v 1.8 2012/06/08 07:18:58 martin Exp $"); + +#include <sys/mman.h> +#include <sys/shm.h> + +#include <atf-c.h> +#include <errno.h> +#include <fcntl.h> +#include <kvm.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/resource.h> + +static long page = 0; +static const char path[] = "mincore"; +static size_t check_residency(void *, size_t); + +static size_t +check_residency(void *addr, size_t npgs) +{ + size_t i, resident; + char *vec; + + vec = malloc(npgs); + + ATF_REQUIRE(vec != NULL); + ATF_REQUIRE(mincore(addr, npgs * page, vec) == 0); + + for (i = resident = 0; i < npgs; i++) { + + if (vec[i] != 0) + resident++; + +#if 0 + (void)fprintf(stderr, "page 0x%p is %sresident\n", + (char *)addr + (i * page), vec[i] ? "" : "not "); +#endif + } + + free(vec); + + return resident; +} + +ATF_TC(mincore_err); +ATF_TC_HEAD(mincore_err, tc) +{ + atf_tc_set_md_var(tc, "descr", "Test errors from mincore(2)"); +} + +ATF_TC_BODY(mincore_err, tc) +{ + char *map, *vec; + + map = mmap(NULL, page, PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0); + vec = malloc(page); + + ATF_REQUIRE(vec != NULL); + ATF_REQUIRE(map != MAP_FAILED); + + errno = 0; + ATF_REQUIRE_ERRNO(EINVAL, mincore(map, 0, vec) == -1); + + errno = 0; + ATF_REQUIRE_ERRNO(ENOMEM, mincore(0, page, vec) == -1); + + errno = 0; + ATF_REQUIRE_ERRNO(EFAULT, mincore(map, page, (void *)-1) == -1); + + free(vec); + ATF_REQUIRE(munmap(map, page) == 0); +} + +ATF_TC_WITH_CLEANUP(mincore_resid); +ATF_TC_HEAD(mincore_resid, tc) +{ + atf_tc_set_md_var(tc, "descr", "Test page residency with mincore(2)"); +} + +ATF_TC_BODY(mincore_resid, tc) +{ + void *addr, *addr2, *addr3, *buf; + size_t npgs = 0, resident; + struct stat st; + int fd, rv; + struct rlimit rlim; + + ATF_REQUIRE(getrlimit(RLIMIT_MEMLOCK, &rlim) == 0); + rlim.rlim_cur = rlim.rlim_max; + ATF_REQUIRE(setrlimit(RLIMIT_MEMLOCK, &rlim) == 0); + + (void)memset(&st, 0, sizeof(struct stat)); + + fd = open(path, O_RDWR | O_CREAT, 0700); + buf = malloc(page * 5); + + ATF_REQUIRE(fd >= 0); + ATF_REQUIRE(buf != NULL); + + rv = write(fd, buf, page * 5); + ATF_REQUIRE(rv >= 0); + + ATF_REQUIRE(fd >= 0); + ATF_REQUIRE(fstat(fd, &st) == 0); + + addr = mmap(NULL, (size_t)st.st_size, PROT_READ, + MAP_FILE | MAP_SHARED, fd, (off_t) 0); + + ATF_REQUIRE(addr != MAP_FAILED); + + (void)close(fd); + + npgs = st.st_size / page; + + if (st.st_size % page != 0) + npgs++; + + (void)check_residency(addr, npgs); + + rv = mlock(addr, npgs * page); + if (rv == -1 && errno == EAGAIN) + atf_tc_skip("hit process resource limits"); + ATF_REQUIRE(munmap(addr, st.st_size) == 0); + + npgs = 128; + + addr = mmap(NULL, npgs * page, PROT_READ | PROT_WRITE, + MAP_ANON | MAP_PRIVATE | MAP_WIRED, -1, (off_t)0); + + if (addr == MAP_FAILED) + atf_tc_skip("could not mmap wired anonymous test area, system " + "might be low on memory"); + + ATF_REQUIRE(check_residency(addr, npgs) == npgs); + ATF_REQUIRE(munmap(addr, npgs * page) == 0); + + npgs = 128; + + addr = mmap(NULL, npgs * page, PROT_READ | PROT_WRITE, + MAP_ANON | MAP_PRIVATE, -1, (off_t)0); + + ATF_REQUIRE(addr != MAP_FAILED); + + /* + * Check that the in-core pages match the locked pages. + */ + ATF_REQUIRE(check_residency(addr, npgs) == 0); + + errno = 0; + if (mlockall(MCL_CURRENT|MCL_FUTURE) != 0 && errno != ENOMEM) + atf_tc_fail("mlockall(2) failed"); + if (errno == ENOMEM) + atf_tc_skip("mlockall() exceeded process resource limits"); + + resident = check_residency(addr, npgs); + if (resident < npgs) + atf_tc_fail("mlockall(MCL_FUTURE) succeeded, still only " + "%zu pages of the newly mapped %zu pages are resident", + resident, npgs); + + addr2 = mmap(NULL, npgs * page, PROT_READ, MAP_ANON, -1, (off_t)0); + addr3 = mmap(NULL, npgs * page, PROT_NONE, MAP_ANON, -1, (off_t)0); + + if (addr2 == MAP_FAILED || addr3 == MAP_FAILED) + atf_tc_skip("could not mmap more anonymous test pages with " + "mlockall(MCL_FUTURE) in effect, system " + "might be low on memory"); + + ATF_REQUIRE(check_residency(addr2, npgs) == npgs); + ATF_REQUIRE(check_residency(addr3, npgs) == 0); + ATF_REQUIRE(mprotect(addr3, npgs * page, PROT_READ) == 0); + ATF_REQUIRE(check_residency(addr, npgs) == npgs); + ATF_REQUIRE(check_residency(addr2, npgs) == npgs); + + (void)munlockall(); + + ATF_REQUIRE(madvise(addr2, npgs * page, MADV_FREE) == 0); + ATF_REQUIRE(check_residency(addr2, npgs) == 0); + + (void)memset(addr, 0, npgs * page); + + ATF_REQUIRE(madvise(addr, npgs * page, MADV_FREE) == 0); + ATF_REQUIRE(check_residency(addr, npgs) == 0); + + (void)munmap(addr, npgs * page); + (void)munmap(addr2, npgs * page); + (void)munmap(addr3, npgs * page); + (void)unlink(path); +} + +ATF_TC_CLEANUP(mincore_resid, tc) +{ + (void)unlink(path); +} + +ATF_TC(mincore_shmseg); +ATF_TC_HEAD(mincore_shmseg, tc) +{ + atf_tc_set_md_var(tc, "descr", "residency of shared memory"); +} + +ATF_TC_BODY(mincore_shmseg, tc) +{ + size_t npgs = 128; + void *addr = NULL; + int shmid; + + shmid = shmget(IPC_PRIVATE, npgs * page, + IPC_CREAT | S_IRUSR | S_IWUSR); + + ATF_REQUIRE(shmid != -1); + + addr = shmat(shmid, NULL, 0); + + ATF_REQUIRE(addr != NULL); + ATF_REQUIRE(check_residency(addr, npgs) == 0); + + (void)memset(addr, 0xff, npgs * page); + + ATF_REQUIRE(check_residency(addr, npgs) == npgs); + ATF_REQUIRE(madvise(addr, npgs * page, MADV_FREE) == 0); + + /* + * NOTE! Even though we have MADV_FREE'd the range, + * there is another reference (the kernel's) to the + * object which owns the pages. In this case, the + * kernel does not simply free the pages, as haphazardly + * freeing pages when there are still references to + * an object can cause data corruption (say, the other + * referencer doesn't expect the pages to be freed, + * and is surprised by the subsequent ZFOD). + * + * Because of this, we simply report the number of + * pages still resident, for information only. + */ + npgs = check_residency(addr, npgs); + + (void)fprintf(stderr, "%zu pages still resident\n", npgs); + + ATF_REQUIRE(shmdt(addr) == 0); + ATF_REQUIRE(shmctl(shmid, IPC_RMID, NULL) == 0); +} + +ATF_TP_ADD_TCS(tp) +{ + + page = sysconf(_SC_PAGESIZE); + ATF_REQUIRE(page >= 0); + + ATF_TP_ADD_TC(tp, mincore_err); + ATF_TP_ADD_TC(tp, mincore_resid); + ATF_TP_ADD_TC(tp, mincore_shmseg); + + return atf_no_error(); +} |
